A method and device for transmitting a service are disclosed. A terminal device receives position information of specific radio frames in a time unit, and position information of a specific subframe in each of the specific radio frames in the time unit from a base station. Every 2m radio frames in the time unit include one specific radio frame, the position information of the specific radio frames in the time unit comprises a value of a period of the specific radio frames in the time unit, and a length of the period is 2m radio frames, where m is a nonnegative integer. The terminal device receives the service carried in the specific subframe in one or more of the specific radio frames from the base station in accordance with the position information of the specific radio frames and the position information of the specific subframe.